Vacuum electrodes or rubber electrodes are strapped or fixed with the adhesive tape and covered with a conductive gel and then placed on the patient’s skin. The wires connecting the electrodes to the unit can be concealed by clothing.
Positioning of electrodes
A number of approaches may be used. Electrodes can be placed over
· Acupuncture points, motor points or trigger points.
· Area of greatest intensity of pain
· Appropriate dermatome or spinal segment
· Appropriate peripheral nerve
Whichever position is chosen for electrode placement, it is best if the skin below them has an intact sensory mechanism as it is the large-diameter afferent sensory stimulation produced by the TNS current acting on the skin that produces the effect on pain. Once the electrodes have been positioned, the TENS can be applied by setting the parameters.